| 摘要 |
The invention relates to a method for a field compensation of an electronic compass for influences to a geomagnetic field by magnetic objects in the vicinity of the compass, that is done with acquiring a magnetic field value by a magnetic field sensor and acquiring an inclination with respect to level plane by an accelerometer, in a discrete set of multiple orientations of the compass.;Therein, a user guidance for subsequently orienting the compass into a predetermined desired range of orientation is provided to the user. In the following, compensation data are calculated from those magnetic sensor acquisitions to compensate for the influences in such a way, that a magnetic north heading is determinable based on the compensated magnetic field values.;Therein, the user guidance for the compensation is done with a gathering of directional information based on rotary rate readings from a gyroscope for an azimuthal component of the orientation. |
| 主权项 |
1. A method for a field compensation of an electronic compass, in particular in a handheld observation device, for influences to a geomagnetic field by magnetic objects, in particular soft-magnetic, hard-magnetic and/or electro-magnetic objects, in the vicinity of the compass,
with
acquiring a magnetic field value by a magnetic field sensor with three, in particular substantially perpendicular, sensitivity axis andacquiring an inclination with respect to level plane by an accelerometer with at least two, in particular substantially perpendicular, sensitivity axis, in a discrete set of multiple orientations of the compass, wherein a user guidance for subsequently orienting the compass into a predetermined desired range of orientation is provided by indicating the desired range to the user, and
calculating of compensation data from the magnetic sensor acquisitions to compensate for the influences in such a way that a magnetic north heading is determinable based on the compensated magnetic field values, wherein,
the user guidance for the compensation is done with a gathering of directional information based on rotary rate readings from at least one gyroscope for indicating at least an azimuthal component of the orientation. |
